#!/usr/bin/env python3

import vim
import re
import sys

def dec2banana(num, dictstart = None, shiftend = None, minlength = None, dictionary = None):
    #defaults
    if dictstart is None: dictstart = 0
    if shiftend is None: shiftend = 0
    if minlength is None: minlength = 0
    if dictionary is None: dictionary = [list("bcdfglmnprstvz"), list("aeiou")]
    
    numdict = len(dictionary)
    v = num
    st = ""
    l = 0

    i = (numdict - 1 + dictstart + shiftend) % numdict
    while not (v == 0 and i == (numdict - 1 + dictstart) % numdict and l >= minlength):
        r = v % len(dictionary[i])
        v = int(v / len(dictionary[i]))
        st = dictionary[i][r] + st
        i = (i - 1) % numdict
        l += 1
   
    return(st)

    
def banana2dec(banana, dictstart = None, shiftend = None, dictionary = None):
    #defaults
    if dictstart is None: dictstart = 0
    if shiftend is None: shiftend = 0
    if dictionary is None: dictionary = [list("bcdfglmnprstvz"), list("aeiou")] #, list("123456")

    numdict = len(dictionary)
    if (len(banana) - shiftend) % numdict != 0:
        return("Banana non valida")
    v = 0
    for i in range(len(banana)):
        r = (numdict + i + dictstart) % numdict
        try:
            v = v * len(dictionary[r]) + dictionary[r].index(banana[i])
        except:
            return("Carattere non valido in posizione", i+1)
    
    return(v)

def isbanana(banana, dictstart = None, shiftend = None, dictionary = None):
    #defaults
    if dictstart is None: dictstart = 0
    if shiftend is None: shiftend = 0
    if dictionary is None: dictionary = [list("bcdfglmnprstvz"), list("aeiou")] #, list("123456")

    numdict = len(dictionary)
    if (len(banana) - shiftend) % numdict != 0:
        return(False)
    for i in range(len(banana)):
        r = (numdict + i + dictstart) % numdict
        if banana[i] not in dictionary[r]:
            return(False)

    return(True)

def callback(x):
    return "%s" % dec2banana(int(x[0], base=10)).upper()

def text2banana(text):
    text = re.sub(r"[0-9][0-9]*",callback,text)
    return text

def callback_dec(x):
    b = x[0].strip().lower()
    if isbanana(b):
        return "%s" % banana2dec(b)
    else:
        return x[0]

def text2dec(text):
    text = re.sub(r"[A-Z][A-Z]*",callback_dec,text)
    return text

def get_selected_text():
    buf = vim.current.buffer
    (lnum1, col1) = buf.mark('<')
    (lnum2, col2) = buf.mark('>')
    lines = vim.eval('getline({}, {})'.format(lnum1, lnum2))
    if len(lines) > 1:
        lines[0] = lines[0][col1:]
        lines[-1] = lines[-1][:col2]
    else:
        lines[0] = lines[0][col1:col2+1]

    return "\n".join(lines)

def replace_selected_text(new_str):
    buf = vim.current.buffer
    (lnum1, col1) = buf.mark('<')
    (lnum2, col2) = buf.mark('>')
    lines = vim.eval('getline({}, {})'.format(lnum1,lnum2))
    new_str = lines[0][:col1] + new_str + lines[-1][col2+1:]
    new_str_list = new_str.split('\n')
    del buf[lnum1-1:lnum2]
    buf.append(new_str_list, lnum1-1)
    vim.command("delmarks < >")

    return new_str

def enc_line():
    vim.current.line = re.sub(r"[0-9][0-9]*",callback,vim.current.line)

def dec_line():
    vim.current.line = re.sub(r"[A-Z][A-Z]*",callback_dec,vim.current.line)